Contrasting with the laid back quiet nature of Point Quobba, entering shark bay we found ourselves in a real tourist location. Even the main road heading up the peninsular has a grand sandstone brick entrance at the hwy turn-off… It is obviously widely promoted, with a larger presence of Asian tourist compared to other attractions/locations we’ve seen on the WA coastline. I gather it is primarily the dolphins that they come to see. In terms of Aussie tourists / grey nomads, the caravan parks were pretty empty.
We visited the attractions (some of them anyway) as we came across them. The first turnoff was to Hamelin Pool, and the stromatolites within. Hamelin Pool simply refers to the huge shallow area of Shark Bay, which is really salty due to evaporation and little fresh water inflow. Its about double the salt concentration of normal seawater! The result of this is that not much can survive in this salty water, so most of the life forms present in the water are pretty primitive.
The stromatolites are one example of this – they are just the build up of microbes over time, that has turned into a type of living rock. Or microbial mats, converted into microbialites, as the signs put it.
stromatolites on the edge of the bay
The next attraction is Shelly Beach, which is probably different from what you might first imagine. Yes it is very shelly, in fact the whole beach is made of shells – up to 9m deep in total! However it is all one type of shell/organism, the Fragum Cockle. This beach is also on the Hamelin Pool, and the Fragum Cockle is the only seashell that can survive the high salt concentration! This gives it a monopoly on the shoreline, which it has had for many many years. Fortunately it is a smallish nice enough looking white shell, so its a pretty beach to look at!!
Shelly Beach
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